#include <stdio.h>

static long num_steps = 100000;
double step;
void main (){
	int i; double x, pi, sum = 0.0;
	printf("wtime :%f\n" , omp_get_wtime() );
	step = 1.0/(double) num_steps;
	for (i=0;i< num_steps; i++){
		= (i+0.5)*step;
		m = sum + 4.0/(1.0+x*x);
	}
	pi = step * sum;
	printf("wtime :%f\n" , omp_get_wtime() );
	printf("pi is %f\n" , pi );
}
